Sweet potato starch is extracted from fresh sweet potato, like the cassava starch and potato starch. The sweet potato starch is mainly used for making food. Sweet potato starch noodles are one kind of food very popular in Asia countries.

Sweet potato starch production flow chart

The sweet potato starch production process includes several steps: sweet potato cleaning and washing, sweet potato milling, sweet potato starch extraction, starch milk refining, starch dewatering, and drying.

A detailed description of the sweet potato starch production machine:

Sweet potato starch cleaning and washing machines

1. Sweet potato cleaning and washing by sweet potato starch production machine

Sweet potatoes can be cleaned by dry or wet methods.

1). Dry method:

After the sweet potatoes are transported to the feed hopper by a forklift, they are conveyed by a belt to the dry screen and rotary washing machine to remove impurities on the sweet potatoes.

2). Wet methods:

Sweet potatoes are placed during the transport to the Rotary washing machine by channel. In addition, before the Rotary washing machine, Straw and stone separators are installed. The stones, sludge, and light wastes are removed at this step. Water used for washing is then purified and recycled back into the process.

2. Sweet potato milling by sweet potato starch production machine

Most often the milling of sweet potato tubers is carried out by the Cutting machine and Rasper machine. The purpose of this stage is disruption of cell walls, which therefore release as much starch as possible to extract starch from sweet potato.

3. Starch extraction process during sweet potato starch production machine

The sweet potato slurry will be pumped into the Centrifuge sieve to separate the starch milk and the fiber with peels. Starch milk is contaminated by small fiber particles and the remaining components of the sweet potato juice–that’s why it is called raw starch milk.

Sweet potato starch processing machines

4. Starch milk refining process during sweet potato starch production machine

Raw starch milk is purified in the refining process. This involves the removal of small fibers from the starch milk and then the removal of juice water and starch milk condensation. For this purpose, Hydrocyclone stations are commonly used. Hydrocyclones due to the low output (approximately 0.3 cubic meter per hour) are connected in 16-18 stages. Refined starch milk has a density of about 22° Be, which is about 38% of starch.

Sweet potato starch dewatering and drying machines

5. Dewatering and Drying of refined starch milk process during sweet potato starch production machine

Dewatering of refined starch milk is carried out in three stages.

In the first stage, the excess water is removed using a Vacuum filter (with water content 38–40%).

In the second stage, the starch Flash dryer machine will dry the wet starch (with a water content of 36–40%) with hot air for 2–3 seconds. Due to the short time of high-temperature drying and intensive water evaporation from the starch granules, its surface is heated only to 40 °C. Dried sweet potato starch contains about 12%~13% of water content.

In the last stage, a Package machine automatically packs sweet potato starch products which is labor-saving and has a high efficiency.

Doing company is committed to the continuous upgrading of starch production machine production technology, providing customers with efficient and high-quality modern sweet potato starch production machines. If you want to buy sweet potato starch production machine, you can contact me at any time. Our professional engineers will answer your questions at any time.